import React from 'react'
import { Outlet, Link, NavLink,useNavigate } from "react-router-dom";
//通过useNavigate做回退和前进 ,传1就是前进，传-1就是后退

export default function Main() {
  const navigate = useNavigate()
  return (
  <div>
    <div className="row">
      <div className="col-xs-offset-2 col-xs-8">
        <div className="page-header"><h2>React Router Demo</h2></div>
        <button onClick={()=>navigate(1)}>前进</button>
        <button onClick={()=>navigate(-1)}>后退</button>

      </div>
    </div>
    <div className="row">
      <div className="col-xs-2 col-xs-offset-2">
        <div className="list-group">
            <NavLink className="list-group-item" to="/main/about">About</NavLink>
            <NavLink className="list-group-item" to="/main/home">Home</NavLink>
         
        </div>
      </div>
      <div className="col-xs-6">
        <div className="panel">
          <div className="panel-body">
            <Outlet/>
          </div>
        </div>
      </div>
    </div>
  </div>
  )
}
